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Home Explore Service Manual - FME1504R, NME1254R

Service Manual - FME1504R, NME1254R

Published by Scotsman®LATAM, 2016-07-23 13:25:56

Description: Service Manual - FME1504R, NME1254R


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NME1254R & FME1504RINTRODUCTIONTo the owner or user: The service manual you arereading is intended to provide you, and themaintenance or service technician, with theinformation needed to install, start up, clean,maintain, and service this ice system. Table of Contents Page 2FOR THE INSTALLER · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 3FOR THE INSTALLER: Remote Condenser · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 4FOR THE INSTALLER · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 5Remote Condenser Location · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 6FOR THE INSTALLER: Remote Condenser Installation · · · · · · · · · · · · · · · · · · · · · Page 7FOR THE INSTALLER · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 8FOR THE PLUMBER · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 9FOR THE ELECTRICIAN · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 10FOR THE INSTALLER: Completed Installation · · · · · · · · · · · · · · · · · · · · · · · · · · Page 11FOR THE INSTALLER: Final Check List · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 12START UP · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 13COMPONENT DESCRIPTION · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 14COMPONENT DESCRIPTION: Control Box Components · · · · · · · · · · · · · · · · · · · · Page 15ELECTRICAL SEQUENCE: · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 16OPERATION: Water · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 17OPERATION: Refrigeration · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 18OPERATION: Refrigeration · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 19OPERATION: Refrigeration · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 20CLEANING and SANITATION · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 21SENSOR MAINTENANCE: · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 22BEARING MAINTENANCE · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 23AUGER MAINTENANCE · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 24SERVICE DIAGNOSIS: · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 25SERVICE DIAGNOSIS: · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 26CONTROL SYSTEM DIAGNOSTICS · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 27REMOVAL AND REPLACEMENT: Reservoir · · · · · · · · · · · · · · · · · · · · · · · · · · Page 28REMOVAL AND REPLACEMENT: Bearing And Breaker · · · · · · · · · · · · · · · · · · · · Page 29REMOVAL AND REPLACEMENT: Auger · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 30REMOVAL AND REPLACEMENT: Evaporator & Water Seal · · · · · · · · · · · · · · · · · · Page 31REMOVAL AND REPLACEMENT: Evaporator · · · · · · · · · · · · · · · · · · · · · · · · · · Page 32REMOVAL AND REPLACEMENT: Gearmotor · · · · · · · · · · · · · · · · · · · · · · · · · Page 33REFRIGERATION SYSTEM SERVICE · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 34What to Do Before Calling for Service · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Note this symbol It marks a possible hazard. when it appears. January 2000 Page 1

NME1254R & FME1504RFOR THE INSTALLEREither the NME1254R or the FME1504R can beused on a variety of ice storage bins: · SB480 and extensions (with bin top KBT18) · HTB555 or BH550 - direct fit · BH800 using bin top KBT23 · BH801 using bin top KBT29 · BH900 using bin top KBT22NME1254 Dispenser ApplicationsThe NME1254 can be placed on and used withcertain ice and ice-beverage dispensers. Kits arerequired for proper operation. ·ID200 or ID250, use adapter KBT44 and KNUGDIV and KDIL-N-ID2 ·Cornelius ED/DF200 beverage dispensers, use KBT44 and KDIL-N-200 ·Cornelius ED/DF250 beverage dispensers, use KBT44 and KDIL-N-250 ·Lancer nugget IBD, use KDIL-N-L & Lancer kit #82-3491SpecificationsModel Number Dimensions Basic Ice Type Condenser Minimum Maximum Refrigerant (w/o Bin) Electrical Type Circuit Fuse Size Charge H\" x W\" x D\"FME1504RS-32A 27 x 30 x 24 208-230/60/1 FLAKE Remote Air 17.3 25 208 ounces 208 ouncesNME1254RS-32A SAME SAME NUGGET Remote Air 17.3 25+ Minimum Circuit Ampacity is used to determine wire size per National Electric Code. January 2005 Page 2

NME1254R & FME1504RFOR THE INSTALLER: Remote CondenserInstallation Limitations:This ice system is designed to be installed indoors, Scotsman Ice Systems are designed and manufactured with the highest regard for safetyin a controlled environment: and performance. They meet or exceed the standards of UL, NSF, and CUL.Air Temperature Min. Max.Water Temperature 500F 1000F Scotsman assumes no liability or responsibility of 400F 1000F any kind for products manufactured by Scotsman that have been altered in any way, including theWater Pressure 20 psi 80 psi use of any part and/or other components not specifically approved by Scotsman.Voltage 5% +10% Scotsman reserves the right to make design(Compared to the nameplate) changes and/or improvements at any time. Specifications and design are subject to changeThe temperature limitations do not apply to the without notice.remote condenser. It will work between -20degrees F, and 120 degrees F.Operating the machine outside of the limitations ismisuse and can void the warranty. ERC DIMENSIONS Model A B F G ERC201 33 3 8\" 10 3 4\" 16 3 4\" 11 5 8\" ERC402 43 3 8\" 10 3 4\" 21 3 4\" 16 5 8\" 23 \"13 16 19 7 8\"SPECIFICATIONS: REMOTE CONDENSERModel Use with Basic Electrical 208-230/60/1ERC201-32 1 FME1504R or 1 208-230/60/1 NME1254RERC402-32 1 or 2 FME1504Rs/NME1254RsRTE25 Precharged line set, 25’. R-404ARTE40 Precharged line set, 40’. R-404A* Two machines on one condenser require a fan relay kit.Icemaker Nameplate Located On Back Panel Serial Plate Located Behind Front Panel January 2000 Page 3

NME1254R & FME1504RFOR THE INSTALLER Location: LEVEL THE ASSEMBLY GASKETAfter uncrating and inspection, the unit isready for installation. It is important that the FASTEN THE MACHINEmachine be installed in a location where it TO THE BIN WITH THEhas enough space around it to be HARDWARE SUPPLIEDaccessible for service, usually a minimum of WITH THE ICEMAKER6 inches. Try to avoid hot, dirty andcrowded locations. Be sure that the locationfor the machine is within the limitationsdescribed on page 3. Storage Bin:Tip the storage bin on its back, using partsof the carton to protect the exterior finish.Install the legs into the threaded holes in thebottom of the bin. Turn the leg levelers allthe way in preparation for leveling later.Return the bin to the upright position,remove paper covering the bin gasket.Install bin top if required, follow thedirections included with the bin top.Note: Do not push bin into position, but lift itthere. Pushing a bin, especially one with icein it, can cause damage to the legs and theleg mounts. Ice Maker:The machine is heavy, so the use of amechanical lift is recommended for liftingthe machine high enough to install on top ofthe bin. After the unit is placed on the bin,line it up so it is even with the back, left, andright sides. Secure the machine to the binwith the hardware provided with themachine.Remove the front panel and remove thestyrofoam shipping blocks from under thegearmotor, the top of the ice chute, andfrom between the gearmotor and the rightside panel. January 2000 Page 4

Remote Condenser Location NME1254R & FME1504RUse the following for planning the placement of Do NOT:the condenser relative to the ice machine ·Route a line set that rises, then falls, then rises.Location Limits - condenser location must not ·Route a line set that falls, then rises, then falls.exceed ANY of the following limits: Calculation Example 1: ·Maximum rise from the ice machine to the The condenser is to be located 5 feet below the ice machine and then 20 feet away horizontally. condenser is 35 physical feet 5 feet x 6.6 = 33. 33 + 20 = 53. This location would be acceptable ·Maximum drop from the ice machine to the Calculation Example 2: The condenser is to be located 35 feet above and condenser is 15 physical feet then 100 feet away horizontally. 35 x 1.7 = 59.5. 59.5 +100 = 159.5. 159.5 is ·Physical line set maximum length is 100 feet. greater than the 150 maximum and is NOT acceptable. ·Calculated line set length maximum is 150.Calculation Formula: ·Drop = dd x 6.6 (dd = distance in feet) ·Rise = rd x 1.7 (rd = distance in feet) ·Horizontal Run = hd x 1 (hd = distance in feet) ·Calculation: Drop(s) + Rise(s) + Horizontal Run = dd+rd+hd = Calculated Line LengthConfigurations that do NOT meet theserequirements must receive prior writtenauthorization from Scotsman. 40h.d35\" Remote Condenser Located ABOVE Ice Machinerd22.87\" 17.15\"dd Remote Condenser Located BELOW Ice Machine January 2000 Page 5

NME1254R & FME1504RFOR THE INSTALLER: Remote Condenser InstallationLocation: 4. Spiral the excess length of pre charged tubing inside the building. Use a horizontal spiral (asLimited to a 40 foot or a 25 foot length of illustrated) to avoid any traps in the lines.precharged refrigerant tubing connecting theicemaker to the remote condenser. The condenser Note: spiral need not be as tight as illustrated.must be above or level with the icemaker. 5. Have the roofing contractor seal the holes in theSelect the best available location, protecting the roof per local codes.condenser from extremes of dirt, dust, and sun.Meet all applicable building codes. Usually theservices of a licensed electrician are required.Roof Attachment:1. Install and attach the remote condenser to theroof of the building, using the methods andpractices of construction that conform to the localbuilding codes, including having a roofingcontractor secure the condenser to the roof.2. Have an electrician connect the remotecondenser fan motor to the icemaker, using thejunction box at the back of the icemaker.PRECHARGED LINE ROUTING REMOTE CONDENSER CAUTIONDo not connect precharged tubing until all routingand forming of the tubing is complete. See thecoupling instructions, next page for connectinginstructions.1. Each set of precharged refrigerant lines (either LOCATE REMOTE SPIRAL25 foot or 40 foot) consists of a 3/8 inch diameter CONDENSER EXCESSliquid line and a 1/2 inch diameter discharge line. TUBINGBoth ends of each line have quick connect ABOVE ICEMAKER INSIDEcouplings, one end has a schrader valve BUILDINGconnection, that end goes to the condenser.Note: The openings in the building ceiling or wall,listed in the next step, are the minimum sizesrecommended for passing the refrigerant linesthrough.2. Have the roofing contractor cut a minimum holefor the refrigerant lines of 1 3/4 inch. Check localcodes, a separate hole may be required for theelectrical power to the condenser. CAUTIONDO NOT KINK OR CRIMP REFRIGERANTTUBING WHEN INSTALLING IT.3. Route the refrigerant lines through the roofopening.Follow straight line routing whenever possible.Any excess tubing MUST be retained within thebuilding. January 2000 Page 6

FOR THE INSTALLER NME1254R & FME1504RNote: The couplings on the sets of precharged 4b. Using two wrenches, one to rotate the swivellines must be installed properly to prevent leaking. nut and one to hold the tubing, tighten eachCarefully follow the instructions: coupling.Initial Connections:1. Remove the protector caps and plugs. Wipe theseats and threaded surfaces with a clean cloth tobe certain that no foreign matter remains on them.2. Lubricate the inside of the couplings, especiallythe O-Rings with refrigerant oil.3. Position the fittings on the correct connectionson the condenser and ice machine. Tighten Swivel NutClean and Lubricate Couplings It is CRITICAL that ONLY the NUT on the pre-charged tube be turned or the diaphragms will ·The ½ inch discharge line (schrader valve end) be torn loose by the piercing knives and be loose in the refrigeration system causing severe goes to the remote condenser fitting marked operational problems. “discharge line.” Note: As the coupling is tightened, the diaphragms in the quick connect couplings will ·The 38 inch liquid line (schrader valve end) goes begin to be pierced. As that happens, there will be increased resistance to tightening the to the remote condenser fitting marked “liquid swivel nut. line.” 4c. Continue tightening the swivel nut until it bottoms out or a very definate increase in ·The ½ inch discharge line goes to the ice resistance is felt (no threads should be showing). Do NOT overtighten. maker fitting marked “discharge line.” Rotate Swivel Nut ¼ Turn More ·The 38 inch liquid line goes to the ice maker 5. Using a marker or pen, mark a line lengthwise fitting marked “liquid line.” from the coupling union nut to the bulkhead. ThenFinal Connections: tighten the coupling and additional 1/4 turn. As the nut turns, the line will show when 1/4 turn is made.4a. Begin by tightening the couplings together by 6. After all connections are made, and after thehand. Continue to turn the swivel nuts by hand until king valve has been opened (do not open at thisis is certain that the threads are properly engaged. time), check the couplings for leaks.SCHRADER VALVE NO SHRADERTO REMOTE TO ICEMAKER January 2000 Page 7

NME1254R & FME1504RFOR THE PLUMBERCONFORM TO ALL APPLICABLE CODES Water Inlet DrainsThe recommended water supply is cold water. There is one 3/4\" FPT drain at the back of theUse 3/8\" O.D. copper tubing, connect to the 3/8\" cabinet, the drain line is of the gravity type, and 1/4male flare at the back of the cabinet. Install a hand inch per foot fall is an acceptable pitch for the drainvalve near the machine to control the water supply. tubing. There should be a vent at the highest point of the drain line, and the ideal drain receptacle would be a trapped and vented floor drain. Use only 3/4\" rigid tubing. Storage Bin: Install a separate drain line. Insulation of this drain line is recommended. WATER ICEMAKER DRAIN INLET 3/4\" FPT 3/8\" FLARE HAND SHUT OFF VALVECONNECT TOCOLD WATER BIN DRAIN 3/4\" FPTFIELD INSTALLED FILTER (OPTIONAL) January 2000 Page 8

NME1254R & FME1504RFOR THE ELECTRICIANCONFORM TO ALL APPLICABLE CODESThe electrical power to the unit is supplied REMOTE CONDENSERthrough the junction box at the rear of the WATERPROOFmachine. (LIQUID TIGHT) CONDUITCheck the nameplate (located on the backpanel) for the voltage requirements, and ICEMAKERfor the minimum circuit ampacity. The JUNCTION BOXmachine requires a solid chassis to earthground wire. POWER SUPPLYThe ice maker should be connected to itsown electrical circuit so it would beindividually fused. Voltage variation mustremain within design limitations, evenunder starting conditions.Electrically the remote condenser fanmotor is connected to the icemaker at thecontactor terminals for the compressorand the fan motor operates whenever thecompressor operates.Electrical connections are made at thejunction box at the back of the icemakerand at the junction box on the remotecondenser.The remote condenser must be wired tothe icemaker in accordance with local andnational electrical codes with a minimumof 18 Awg. wire with an ground bondingwire connected to the ground screwsprovided in both the condenser andmachine field wiring boxes. All outdoorwiring must be in rainproof conduit.All external wiring must conform tonational, state, and local electricalcodes. The use of a licensedelectrician is required to perform theelectrical installation. January 2000 Page 9

NME1254R & FME1504RFOR THE INSTALLER: Completed Installation A typical installation should generally appear as illustrated below. The remote condenser must be located above the icemaker and the precharged lines installed per the instructions on page 6. ROOF CUT-AWAY INSULATED PRECHARGED REFRIGERANT TUBING January 2000 Page 10

NME1254R & FME1504RFOR THE INSTALLER: Final Check List1. Is the ice system installed indoors in LEVELED?a location where the air and watertemperatures are controlled, and POWER SUPPLY?where they do not exceed the design PLUMBING?limitations? DRAINS?2. Is there an electrical servicedisconnect within sight of the installedmachine? Has the voltage beenchecked, and compared to nameplaterequirements?3. Have all the plumbing connectionsbeen made and checked for leaks?4. Has the machine and bin beenleveled?5. Is there a minimum of 6\" clearanceat the rear, left, and right of themachine for proper service access andair circulation?6. Is the water pressure a minimum of20 psig?7. Has the machine been secured tothe bin?8. Is there a water shut off valveinstalled near the machine?9. Is the remote condenser installedper local building codes, and in a placewhere it has adequate ventilation andminimal solar heat gain?10. Has all shipping material (underand next to the gearmotor, and on topof the ice chute) and literature (insidethe front panel) been removed fromthe units?11. Have the remote condenser andprecharged lines been properlyinstalled?12. Has the electrical connectionbetween the icemaker and thecondenser been made?13. Verify that the master switch is inthe OFF position.14. Switch on the electrical power.15. Refer to Pre-Start instructions, thenext page. January 2000 Page 11

NME1254R & FME1504RSTART UPPre-Start Inspection1. Remove the front, left, and right side service 4. Check that the refrigerant lines are properlypanels. installed.2. Check that the styrofoam shipping blocks under 5. Check that the electrical power has been on forthe gearmotor, on top of the ice discharge chute, at least 4 hours.and between the gearmotor and the right sidepanel have been removed.3. Inspect the interior of the machine for loose 6. Check that the unit is installed correctlyscrews or wires. Check that no refrigerant lines according to the final check list on page 10.are rubbing each other. Check that the fan bladeturns freely (remote condenser). Start Up1. Go through the pre-start inspection. The low side pressure may be 25 to 28 PSIG in low condensing temperatures, and 35 to 40 PSIG2. Open the hand valve, observe that water enters when in high condensing temperatures.the water reservoir, fills the tube from the reservoirto the evaporator, and then shuts off. Check for The discharge pressure will depend upon air andleaks. water temperatures, but should be between 180 - 200 psig when in low condensing temperatures;3. Open the King Valve. and 320 to 420 psig when in high condensing temperatures.4. Switch the master switch on. 7. THERE ARE NO ADJUSTMENTS TO MAKE,The electrical start up sequence is now on so replace the panels.automatic.A. There should be a short (15 second) delay 8. Clean and/or sanitize the storage bin interior,before the gearmotor starts. wipe off the exterior with a clean, damp cloth.B. After the gearmotor starts, the liquid line valvewill open, the pump down control will close and the 9 Give the owner/user the service manual, instructcompressor will start. him/her in the operation of the unit, and make sure they know who to call for service.5. The remote condenser fan turns, and thecondenser begins to discharge warm air. 10. Fill out the Customer Evaluation and Warranty Registration form, and mail it to Scotsman.6. The unit should soon be making ice, if desiredthe low side pressure can be checked, it should be30 psig + or - 4 psig.January 2000 Page 12

COMPONENT DESCRIPTION NME1254R & FME1504RControl Box: Contains the electrical controls that Ice Level Sensor: An electronic “eye”, it sensesoperate the machine. the presence of ice in the bottom of the ice discharge chute. Operates to turn the ice machineHigh Pressure Cut Out (control): An automatic on and off automatically as the level of ice in thereset switch sensing the high side refrigeration bin changes.pressure. It is set to shut the machine off at 450 Gear Motor: An oil filled, speed reductionpsig. gearbox, driving the auger. Cleaning Drain Tube: When uncapped andPump Down Control: A switch to control the lowered, drains the evaporator.compressor, depending upon low side pressure: Compressor: The refrigerant vapor pump.closes at 30 PSIG, and opens at 15 PSIG. Expansion valve: The refrigerant metering device.Evaporator: A vertical stainless steel tube,refrigerated, and water filled. In it there is astainless steel auger.Reservoir: Float operated, it maintains the waterlevel in the evaporator at a constant level, it alsocontains the water level sensor.Water Level Sensor: Senses if there is water inthe reservoir to make ice out of. Will shut themachine off it there is none.Ice Discharge Chute: Directs the ice produced bythe evaporator into the storage bin. CONTROL BOX RESERVOIR ICE CHUTEWATER LEVEL SENSOR EXPANSION (INSIDE RESERVOIR) VALVE COMPRESSOR GEAR MOTOR HIGH PRESSURE EVAPORATOR CUT OUT CLEANING DRAIN TUBE ICE LEVEL SENSORS January 2000 Page 13

NME1254R & FME1504RCOMPONENT DESCRIPTION: Control Box ComponentsContactor: A definite purpose contactor Potential Relay: The compressor start relay.connecting the compressor and the remote On/Off Switch: Manual control for the machine.condenser fan motor to the power supply.Circuit Board: Controlling the ice machinethrough sensors and relays. The sensors are: icelevel, and water level. The relays are for the gearmotor (with a built in time delay to clear theevaporator of ice when the unit turns off) and forthe liquid line valve. Control BoardWater OK Light Power Light Service Light Freeze LightBin Full LED3 Auger Light Relay January 2000 LED1 Page 14 Compressor Relay

NME1254R & FME1504RELECTRICAL SEQUENCE:There are 7 indicator lights on the control board: Shut Down:·WTR-OK (Water OK). Green. Normal = ·The compressor relay opens, LED1 goes out. Glowing. Glows when there is water in the ·The liquid line valve closes, stopping refrigerant reservoir. flow.·PWR-OK (Power OK). Green. Normal = ·The pump down control opens after the suction Glowing. Glows when the control board has power and is functional. pressure falls to its cut out point.·Service. Red. Normally Off. ·The compressor contactor opens·Freeze. Red. Normally glowing when making ·The compressor stops ice. ·The auger motor stays on for 1 more minute,·Bin Full. Red. Normally Off when making ice. clearing out ice in the evaporator, and then·LED1. White. Located next to the board’s ·The auger motor relay opens, LED3 goes out Compressor Relay. Normally Glowing when and the auger motor stops. making ice. The liquid line valve will not reopen until 2 minutes or more have passed after the last shut down.·LED3. White. Located next to the board’s Auger If the path between the ice level sensors remainsMotor Relay. Normally Glowing when making clear for more than 10 seconds the ice machineice. will restart.If the machine is switched off at the mode switch, Control Board Protection Devicesbut is otherwise ready to go, switching the modeswitch to ON does the following: ·When the water level in the reservoir falls ·The PWR-OK light glows. below the water level sensor’s tip, the WTR-OK light goes out and the machine shuts down.·If there is water in the reservoir the WTR-OK When water refills the reservoir the WTR-OK light glows and the machine starts up again. light glows. ·After 10 seconds the Freeze, LED1 and LED3 ·If the auger drive motor current becomes lights glow and the machine starts up. excessive the liquid line valve and auger driveStart Up: motor will be switched Off and the Service light will blink. The control board will restart the auger ·The compressor relay and auger motor relay drive motor in 4 minutes. If during the first 60 seconds after restart the auger motor current become energized, connecting power to the stays within limits, the liquid line valve is windings of the auger motor and liquid line valve reopened and the machine returns to normal coil. operation. If the auger motor’s current is excessive within 60 seconds after the restart, ·The liquid line valve opens, refrigerant flows to the process will be repeated once more. If the expansion valve. ·The pump down pressure switch closesconnecting power to the contactor coil during that try the current is still excessive the·The contactor is energized, connecting power to machine shuts down and must be manually reset. The service light will then be glowing the compressor, and the compressor starts. continuously. To Reset: Disconnect and reconnect power to·As ice is made it passes between the ice level the ice machine. sensors but because it is not a continuous Other Protection Devices: stream it only interupts the sensor’s infrared beam momentarily. The bin full light remains off ·If the high pressure cut out switch opens the and the machine stays on until ice builds up in the bin and blocks the path between the machine will stop immediately. It will sensors for 6 seconds or longer. When that automatically reset when the pressure falls occurs the bin full light glows and the machine below its cut in point. shuts down. The mode (on - off) switch is the manual control for the complete machine, but it is not a service disconnect.e, but it is not a service disconnect. January 2000 Page 15

NME1254R & FME1504R Water Level: The correct water level should be checked when the machine is making ice. LocateOPERATION: Water the water level in the reservoir, and compare it to he horizontal line molded into the side of theWater reservoir.Water enters the machine through the 3/8\" male The correct level should be between 18\" above andflare at the rear of the cabinet, goes to the water 14\" below the line. If needed, bend the float arm upreservoir which it enters through the float valve. or down to adjust the water level.The water then goes out the bottom of thereservoir tank to the bottom of the evaporator.Reservoir overflow or evaporator condensation isrouted to the drain. RESERVOIR EVAPORATOR DRAIN WATER LEVELWATER INLET DRAIN January 2000 Page 16

OPERATION: Refrigeration NME1254R & FME1504RBeginning at the compressor, the refrigerant is of the evaporator; warmer evaporators get morecompressed into a high temperature gas. The refrigerant and colder evaporators get less. At thedischarge line directs this gas to the condenser evaporator, the refrigerant enters an area ofand to the head pressure control At the remote relatively low pressure, where it can easily “boil off”condenser the gas is cooled by air and it then or evaporate. As it evaporates, it absorbs heatcondenses into a liquid. This high pressure liquid from the evaporator and whatever is in contact withthen goes through the liquid line to the liquid line it (such as the water inside it). After theconnection at the head pressure control. If the evaporator, the refrigerant, now a low pressurehead pressure is high enough the liquid refrigerant vapor, goes through the suction line back towill go through the valve and enter the receiver. compressor, where the cycle is repeated.From the receiver, the liquid refrigerant flowsthrough the liquid line valve and then to theexpansion valve.The thermostatic expansion valve meters liquidrefrigerant into the evaporator, the volume ofliquid refrigerant depending upon the temperature REMOTE CONDENSER LIQUID LINEDISCHARGE DETAIL OF HEAD LINE PRESSURE CONTROL HEAD VALVEPRESSURECONTROL LIQUID LINE VALVE VALVE THERMOSTATIC EXPANSION VALVE EVAPORATOR RECEIVER COMPRESSOR January 2000 Page 17

NME1254R & FME1504ROPERATION: Refrigeration LOW CONDENSING TEMPERATUREThe refrigeration system under low condenser air the receiver to maintain pressure until the headtemperatures is much the same as it is under pressure is built back up to 180 psig). At thathigher temperatures, with the exception that the pressure the valve opens up the liquid line from theresulting low head pressures cause the head condenser to the receiver.pressure control to close off the liquid line betweenthe condenser and the receiver.This forces more refrigerant into the condenser(with a small amount of discharge gas going into REMOTE CONDENSERDISCHARGE LIQUID LINE LINE DETAIL OF HEAD PRESSURE CONTROL VALVE LIQUID LINE THERMOSTATIC VALVE EXPANSION VALVE HEADPRESSURE EVAPORATORCONTROL VALVE RECEIVER COMPRESSOR January 2000 Page 18

OPERATION: Refrigeration NME1254R & FME1504R REMOTE CONDENSER LIQUID LINEDISCHARGE LINE LIQUID LINE VALVE (CLOSED) RECEIVER COMPRESSOR PUMP DOWNDuring the pump down cycle (usually initiated by point the refrigerant flow is stopped by the closedthe circuit board de-energizing the liquid line valve) liquid line valve.the discharge gases flow through their normal pathto the remote condenser, through the head This action forces the refrigerant into the receiverpressure control, and into the receiver. At this and keeps it out of the compressor. The pump down continues until the pump down control opens turning the compressor off. January 2000 Page 19

NME1254R & FME1504RCLEANING and SANITATIONA Scotsman Ice System represents a sizable investment of time and money in any company’s business.In order to receive the best return for that investment, it MUST receive periodic maintenance.It is the USER’S RESPONSIBILITY to see that the unit is properly maintained. It is always preferable, andless costly in the long run, to avoid possible down time by keeping it clean; adjusting it as needed; and byreplacing worn parts before they can cause failure. The following is a list of recommended maintenancethat will help keep the machine running with a minimum of problems.Maintenance and Cleaning should be scheduled at a minimum of twice per year.Electrical power will be ON when doing in place 9. As the ice maker begins to use water from thecleaning. reservoir, continue to add more cleaning solutionICEMAKING SYSTEM: In place cleaning to maintain a full reservoir.1. Check and clean any water treatment devices, 10. After all of the cleaning solution has beenif any are installed. added to the reservoir, and the reservoir is nearly empty, switch the master switch to OFF.2. Pull out and remove the front panel. 11. After draining the reservoir, as in step 6, wash and rinse the water reservoir.3. Move the ON-OFF switch to OFF. To Sanitize: Repeat steps 8-11, except substitute an approved4. Remove all the ice from the storage bin. sanitizing solution for the cleaning solution. A possible sanitizing solution may be made by5. Remove the cover to the water reservoir and mixing 1 ounce of household bleach with 2 gallonsblock the float up. of warm (950F. - 1150F.) water. 12. Remove the block from the float in the water6. Drain the water reservoir and freezer assembly reservoir.using the drain tube attached to the freezer water 13. Switch the master switch to ONinlet. Return the drain tube to its normal upright 14. Continue ice making for at least 15 minutes, toposition and replace the end cap. flush out any cleaning solution.7. Prepare the cleaning solution: Mix eight DO NOT USE any ice produced from the cleaningounces of Scotsman Ice Machine Scale Remover solution.with three quarts of hot water. The solution should Be sure no ice remains in the between 90 and 115 degrees F. 15. Remove all ice from the storage bin. Scotsman Ice Machine 16. Add warm water to the ice storage bin and Scale Remover thoroughly wash and rinse all surfaces within the contains acids. These bin. compounds may cause 17. Sanitize the bin interior with an approved burns. sanitizer using the directions for that sanitizer. If swallowed, DO NOT 18. Replace the front panel. induce vomiting. Give large amounts of water or milk. Call Physician immediately. In case of external contact, flush with water. KEEP OUT OF THE REACH OF CHILDREN.8. Slowly pour the cleaning solution into the waterreservoir until it is full. Wait 15 minutes, thenswitch the master switch to ON.November 2007 Page 21

SENSOR MAINTENANCE: NME1254R & FME1504R1. The bin control uses devices that sense light, 2. The ice machine senses water level by a probetherefore they must be kept clean enough so that located in the water reservoir. At least twice athey can “see”. At least twice a year, remove the year, the probe should be removed from thebin control sensors from the base of the ice chute, reservoir, and the tip wiped clean of mineraland wipe the inside clean, as illustrated. build-up. ICE DISCHARGE CHUTE SLIDE IN AND OUTICE LEVELSENSORS Clean the Probe's Tip with ice machine cleaner and a clean, soft cloth. 3. Clean the remote condenser. Use a vacuum cleaner or coil cleaner if needed. Do NOT use a wire brush. 4. Check and tighten all bolts and screws. January 2000 Page 21

NME1254R & FME1504R ·unscrewing the auger studBEARING MAINTENANCE Auger StudThe bearing in the breaker should also be checkedat least two times per year.Switch the machine Off and check the bearing: ·removing the ice chute cover Chute Cover Cap Screw·unscrewing the ice sweep Inspect the bearing. There should be plenty of grease in sight. If grease is needed the bearing Ice Sweep and breaker should be removed to check the action of the bearing. It should rotate smoothly. To remove the breaker remove the lower ice chute then take out all four allen head cap screws and pull the breaker off the auger and evaporator. If the bearing only needs grease, inject grease into the bearing using Scotsman grease needle pn 02-3559-01 and Scotsman bearing grease cartridge, pn A36808-001. Be sure to inject grease evenly and thoroughly. Bearing Needle, pn 02-3559-01·removing the water shed & unscrewing the breaker cover (left hand threads). Breaker CoverOff See Removal and Replacement section to replace bearing or seals. Reverse to reassemble. January 2000 Page 22

AUGER MAINTENANCE NME1254R & FME1504R Hazardous Moving Note. Water filters can filter out suspended solids, Parts. but not dissolved solids. “Soft” water may not be Moving auger can cause the complete answer. Check with a water personal injury. treatment specialist regarding water treatment. Disconnect electrical For more information on removal of these power before beginning. parts, see REMOVAL AND REPLACEMENT. 1. To remove the auger, remove front and topIn some areas the water supply to the icemaker will panels.have a great deal of minerals in it, and that will 2. Remove bail clip holding the ice chute cover toresult in an evaporator and auger becoming coated the ice chute body, and remove the cover.with these minerals, requiring a more frequent 3. Unscrew and remove ice sweep.removal than twice per year. If in doubt about the 4. Remove ice chute body from evaporator.condition of the evaporator and auger, the auger 5. Remove 4 allen screws holding breaker tocan be removed so the parts can be inspected. evaporator. 6. Pull up on breaker to remove auger. The auger has sharp edges, Allow the auger to dry, the stainless steel of the handle with gloves. auger and evaporator must be clean and bright. Clean the auger and evaporator as required. ALLEN DO NOT HONE THE EVAPORATOR. SCREWS 7. Replace the water seal. 8. Reverse to reassemble. Remote Condenser: Clean the fins of the remote condenser. Use a soft brush or vacuum. Use coil cleaner if grease is embeded in the fins.BREAKER &BEARING & AUGERASSEMBLYJanuary 2000 Page 23

NME1254R & FME1504RSERVICE DIAGNOSIS:Symptom Possible Cause Probable CorrectionNo ice is made, nothing operates Unit off due to no power. Restore power Unit off due to master switch in Off Move master switch to ON position Unit off due to low water level in Check water supply, filter and float reservoir valve. Unit off due to ice level sensors Check/clean ice level sensors (photo-electric eyes) blocked Unit off due to scale on water level Clean water level sensor sensor Unit off due to high pressure control Check for remote condenser fan open motor failure or power interruption to the fan motor Auger motor hums but does not turn Auger can’t turn. Circuit board has not yet shut unit down. Unit is shut down Circuit board has shut ice machine down due to high auger motor amp draw. Check for cause of high amp draw, including bearings, gear motor condition and scale on auger & evaporator. Pump down pressure control open, Auger not turning due to: motor very low suction pressure failure; auger relay failure on circuit board; or gears stripped. Check drive train. Liquid line valve not opening due to coil failure or failure of compressor relay on circuit board TXV restricted or not metering. Check bulb temperature. Lack of refrigerant. Check for a leak. No power to circuit board Check harness High or Low Pressure switch open Circuit board gear motor relay will not Check / replace board close Water level or ice level sensor failed Check / replace sensor January 2000 Page 24

NME1254R & FME1504RSERVICE DIAGNOSIS:Symptom Possible Cause Probable CorrectionUnit makes ice, but very slowly High discharge pressure because of a Clean the condenserWater leak dirty condenser coilExcessive ice meltage Auger and evaporator are coated with Clean the water systemMachine makes too much noise mineral scale Low refrigerant charge Locate leak. Recover refrigerant, repair leak, replace dryer, evacuate and weigh in the nameplate charge. Ice storage bin drain restricted Clean out drain Tubing cracked Replace tubing Condensation on drain tubing Insulate tubing Hose off Re-attach hose Reservoir cover off Return cover to reservoir Reservoir cracked Replace reservoir Evaporator water seal leaks Check base of evaporator & drip pan. If the seal leaks, shut off the wter, remove the auger, replace the water seal. Check gear motor for water infiltration. Bin drain clogged Clean out bin drain Poor fit between bin door and door Adjust or replace frame Evaporator coated internally with Clean with Scotsman Ice Machine minerals Cleaner Motor bearings dry Oil or replace motor January 2000 Page 25

NME1254R & FME1504RCONTROL SYSTEM DIAGNOSTICSThe control system consists of: box can also be used to determine if the ice sensors or board are defective. ·Control Board Using the tester: ·Water Sensor A. Disconnect the ice sensors at the connection by ·Ice Sensors the ice chute. Connect the LED and PHOTO TRANS wires to the control board's wires. ·High Pressure Cut Out B. With the On - Off (mode) switch in either ·Low Pressure Cut Out position, move the Bin Full switch on the tester to Bin Full - the tester's light will blink and after a fewIf the unit is OFF, check the control board: seconds the bin full light on the control board will come on. If not, replace the board.1. Is the Power OK light on? If not check power tothe unit. If it has power, and the Power OK light is Move the Bin switch on the tester to Bin Empty.NOT on, check the high pressure and low pressure The light on the tester will go out, and after a fewcut outs. If they are both closed, replace the board. seconds the Bin Full light on the board will go out.If the Power OK light is ON, go to the next step. If master switch is ON, the unit should start.2. Is the Water OK light on? If it is, go to the next 4. High pressure cut out check.step. If not, check the water level in the reservoir. Ifthere is water in the reservoir, check that the water Disconnect electrical power.sensor is plugged in. To check the water sensor: Pull the wires off the high pressure cut out.A. Unplug water sensor. Use an ohmmeter to determine if the switch isB. Pull water sensor from reservoir. OPEN, If it is, check the discharge pressure. If the discharge pressure is less than 300 PSIG, replaceC. Place one ohmmeter lead on the sensor's plug the high pressure cut out.and the other on the sensor's tip. The meter shouldshow nearly zero resistance. If it reads infinite If the high pressure cut out is open and the systemresistance, check the tip for corrosion. If it is clean has high discharge pressure, check for the cause.and still reads open, replace the sensor. 5. Low pressure cut out check.OR connect a copper wire to the wire where thewater sensor plugs into and place the other end in Disconnect electrical power.the water. The water OK light should go ON. If itdoes not, replace the control board. Pull the wires off the low pressure cut out.3. Ice sensor check. Is the Bin Full light Off? If it is Use an ohmmeter to determine if the switch isOFF and the Service light is Off, and the unit is not OPEN, If it is, check the suction pressure. If therunning, replace the control board. suction pressure is greater than 20 PSIG, replace the low pressure cut out.If it is OFF and the auger motor is running but thecompressor is not, check the compressor contactor If the low pressure cut out is open and the systemcoil. has low suction pressure, check for the cause.If it is on, the ice sensors may be blocked. Removethem and check for mineral scale. Scotsman's testJanuary 2000 Page 26

NME1254R & FME1504RREMOVAL AND REPLACEMENT: ReservoirWATER RESERVOIR FLOAT Water ASSEMBLY Sensor1. Shut off the water supply to the icemaker.2. Remove front panel and reservoir cover.3. Disconnect water inlet compression fitting atreservoir inlet.4. To remove float push locking tab in and pull floatvalve up and out of the reservoir tank.Note: there is a plunger inside the valve that isavailable separately.5. To remove reservoir, remove drain hose fromreservoir.6. Remove evaporator inlet hose from reservoir.7. Pull water sensor from reservoir.8. Remove mounting screws from reservoirbracket, and remove reservoir from icemaker.9. Reverse to reassemble.ICE DISCHARGE CHUTE SLIDE THE LOCKING SENSOR TABSHOLDERS LEFT TO REMOVE BIN CONTROLS (Ice Level Sensors)FROM THE ICE 1. Disconnect electrical power. CHUTE 2. Remove front panel. 3. Remove control box cover. 4. Locate ice chute, at the base of the chute, in front of and behind it are two plastic bin control mounts. 5. Slide each bin control to the left, and in the control box, disconnect the electrical leads connecting the bin control to the circuit board. 6. Reverse to reassemble, be certain that the bin controls are aligned so that the ice level sensors are visible (centered) through the holes in the cube chute. January 2000 Page 27

NME1254R & FME1504RREMOVAL AND REPLACEMENT: Bearing And Breaker Hazardous Moving vice the bearing. Check for rust, rough spots and Parts. damage. Moving auger can cause personal injury. a. The bearing is pressed into the breaker, to Disconnect electrical remove the bearing and replace it an arbor press is power before beginning. needed.Note: Removal of the auger, water seal, evaporator b. Replace lower seals before installing new bearing in breaker.and gearmotor must begin at the top of the Note: seals must be pressed in with a tool pushingassembly. against the outer edge only, they will not install by hand.To Remove the Breaker Bearing Assembly: Replace parts as required. Re-grease bearing with1. Remove panels and disconnect electrical power. Scotsman part no. A36808-001 bearing grease. Replace top seal, and check the o-rings, replace if2. Move bail clip off of ice chute cover and remove cut or chute cover. 7. Reverse to reassemble: specific tools and materials are required to install properly.3. Unscrew and remove ice sweep. a. Add food grade grease such as Scotsman part4. Lift up and remove ice chute. number 19-0569-01 to the seal area before installing on the auger.5. The breaker may be removed from the auger b. Check the seal to shaft areas for cuts, or roughand evaporator without disturbing the auger. spots: none are permitted.a. Unscrew breaker cover from breaker (left handthreads)b. Unscrew auger stud from top of auger.c. Unscrew 4 allen head cap screws holdingbreaker to evaporator.d. Lift up, and remove breaker/bearing assemblyStep 5-a fr Step 5-c & Step 6 o Step 5-b m a BEARING ICE SWEEPu SEALS g er & e v a AUGER STUD p or BREAKE at R COVER or . 6. BREAKER S er January 2000 Page 28

NME1254R & FME1504RREMOVAL AND REPLACEMENT: Auger Hazardous Moving d. Use a slide hammer type puller to pull on the Parts. auger at the threaded hole. The size of that hole Moving auger can cause is 5/8\"-18. personal injury. Inspect the auger, the critical areas of the auger Disconnect electrical are: power before beginning. a. The auger body. It should be clean and shining. Sometimes an auger will appear cleanTo Remove the Auger: when wet, but after it is dry it will be seen to be stained. Scrub the auger with ice machine cleanerTurn off the water to the machine, and unclip the and hot water.evaporator drain hose, pull it down and drain theevaporator into the bin or a container. Ice machine cleaner is an acid. Handle it with extreme care, keep out of the reach of children.1. The top panel must be removed. b. The water seal area. Because the auger has2. The auger and breaker/bearing may now be been removed, the water seal will have to beremoved as an assembly. replaced. Remove the water seal top half from the auger, and inspect the auger for minerals clean asa. Unscrew 4 allen head cap screws holding required.breaker to evaporator. SLIDEb. Lift up on breaker and remove auger from HAMMERevaporator. PULLERNote: If the auger is stuck, the breaker must beremoved from the auger.BREAKER ALLENASSEMBLY SCREWSThe breaker may be removed from the auger andevaporator without disturbing the auger.a. Unscrew breaker cover from breaker (left handthreads)b. Unscrew auger stud from top of auger.c. Unscrew 4 allen head cap screws holdingbreaker to evaporator. January 2000 Page 29

NME1254R & FME1504RREMOVAL AND REPLACEMENT: Evaporator & Water SealTo Remove the Water Seal: REPLACING THE WATER SEAL(Assuming all steps to remove the auger have PLACE FOODbeen performed.) GRADE SILASTIC1. The gearmotor/evaporator assembly will have to HEREbe pulled away from the machine (if not yet done).2. Remove the 4 hex head cap screws holding theevaporator to the gearmotor assembly. Lift theevaporator up and off of the gearmotor.3. Remove the snap ring or wire retainer from thegrove under the water seal.4. Pull or drive out the lower half of the water seal.To Replace the Water Seal:1. Lubricate the water seal with water, and pushthe water seal into the bottom of the evaporatorslightly past the grove for the snap ring.2. Replace the snap ring and pull the water sealdown against it.3. The part of the water seal that rotates with theauger must also be replaced. Remove the old partfrom the auger and clean the mounting area.4. Place a small bead of food grade silastic sealant(such as 732 RTV or Scotsman part number19-0529-01) on the area of the auger where thewater seal is to be mounted.5. Carefully push the water seal (rubber sideagainst the auger shoulder and the silastic.)Do not get any silastic onto the face of the seal.6. Allow the auger and seal to air dry until thesilastic is dry on the surface.7. If the original water seal was leaking, it would bea good idea to inspect the interior of the gearmotor. WATER SEAL RETAINING RINGJanuary 2000 Page 30

NME1254R & FME1504RREMOVAL AND REPLACEMENT: EvaporatorTo Replace the Evaporator: To Reassemble the Evaporator and Auger(Assuming all the steps for removal of the thrustbearing, breaker, auger, and water seal have been 1. After the gearmotor has been inspected, fastenperformed.) the evaporator to the gear motor, be sure that the1. Recover the refrigerant from the ice maker. number of shims indicated on the gear case cover2. Unsweat the refrigerant connections: is in place between the gearcase cover and the drip pan gasket. Torque the bolts to 110 inch a) At the thermostatic expansion valve outlet. pounds. CAUTION 2. Lower the auger into the evaporator barrel,Heat sink the TXV body when unsweating or slightly turning it to match up with the drive end. Doresweating the adjacent tubing. Not Drop Into the Evaporator.b) At the suction line at the joint about 3\" from the 3. Complete the reassembly by reversing theevaporator. disassembly for the breaker & thrust bearing3. Remove the evaporator. assembly.4. Unsweat the drier from the liquid line.5. After installing a new water seal in the new Head Pressure Control Valveevaporator ( see “To Replace the Water Seal”)resweat the tubing connections. 1. Recover system of refrigerant.6. Install an new drier in the liquid line.7. Evacuate the system until dehydrated, then 2. Break off process tube on the top of the OLDweigh in the nameplate charge. Check for leaks. head pressure control valve.8. Install auger, breaker, breaker bearingassembly, and ice discharge chute in reverse order 3. Unsweat old valve from tubing.of disassembly. See “To Reassemble Evaporatorand Auger” 4. Unsweat old dryer from tubing. 5. Install new valve in place. Check for correct connections and be sure that the number on the side of the valve is “180\" 6. Wrap the new valve body in wet cloths to heat sink the valve body. 7. Sweat in the new valve and the new dryer. 8. Evacuate the system, and weigh the nameplate charge into the receiver..January 2000 Page 31

NME1254R & FME1504RREMOVAL AND REPLACEMENT: Gearmotor Electrical Shock D) After replacing parts as required, (if any) Hazard. reassemble the gearcase. The two smaller gears Electrical power can and the oil should be in the lower case, the output cause personal injury. gear will be with the cover. As you lower the cover Disconnect electrical onto the lower case, cover will have to be moved power before beginning. closer to the second gear after the output gear has cleared the second gear top bearing.To Remove and Repair the GearmotorAssembly: E) After the case is together, and the locating pins(Assuming that the procedures through removal of are secure in both ends, replace all cap screws.the water seal have been performed.)1. Remove the electrical wires from the gear drive 4. Bench test the gearmotor, check for oil leaks,motor. noise, and amp draw.2. Unscrew the 4 cap screws holding thegearmotor to the gearmotor plate.3. Remove the gearmotor from theicemaker.To Inspect the gearmotor. COVER WATER SHEDA) Remove the cap screws holdingthe gearmotor case halves togetherand pry the two cases apart.B) To lift off the cover, lift up until you MOTORcan feel internal contact, then pull thecover towards the output gear end, BEARINGand then lift the cover (with drive motorattached) up and away from the gear FIRST GEARmotor case. SECOND GEAR GASKETNote: The case cover output gear, GEARCASEbearings, and shaft are one pressedtogether assembly. Replace as a unit.C) Inspect the oil, gears, andbearings. If the oil level and conditionis acceptable, quickly check the gearsand bearings. They are likely to be fineif the oil is.If there is evidence of water in the oil(rusty bearings and gears; the oilhaving a creamy white appearance; oillevel too high) carefully inspect thebearings and gears. If in doubt aboutthe condition of a part, replace it. Theoil quantity is 14 fluid ounces, do notoverfill.Note: The gears and bearings areavailable only as pressed togethersets. January 2000 Page 32

NME1254R & FME1504RREFRIGERATION SYSTEM SERVICEGeneral: This ice machine uses R-404A refrigerantand polyolester oil. Do NOT use mineral oil in thisrefrigeration system. ·When the system is serviced, a special liquid line drier is required. It is included with replacement compressors. ·R-404A is not compatible with mineral oil so these ice machines use Polyolester oil. Polyolester oil absorbs water very easily. A system opened for service must be re-sealed as soon as possible (15 minutes maximum). ·Special leak detection equipment is required to locate small refrigerant leaks. Usually a leak detector capable of detecting a Halongenated refrigerant or HFC-134a will work. Check with the leak detector manufacturer if in doubt. ·Evacuate to 300 microns. ·Liquid charge the systemAccess Valves: To use the access valves: ·Remove the cap from the stem, use a 3/16\" allen wrench to check that the valve is CLOSED. The remove the core cap. ·Close the valve and replace the caps when done. The valve must be closed and the caps must be on or the valve will leak.CHARGING PROCEDURES valves at the front of the unit for weighing in the charge. All liquid refrigerant must be weighed intoExtra care must be taken when recharging this the receiver through the “front seated” king valve.remote system. No liquid refrigerant maybe placedin the system at the compressor. DO NOT use theRECEIVER KING VALVE SERVICE PORT CHARGING CYLINDER or SCALE January 2000 Page 33

NME1254R & FME1504RWhat to Do Before Calling for ServiceIf the machine is off, not making ice:1. Check the water supply to the icemachine. The machine is designed to shutoff if there is no water to it. Check the filtersif there are any.2. Check the power supply to the machine.Reset the breaker if it is tripped.3. If both water and power have beenchecked and are available, try switchingthe power Off and then On. After 2 minutesthe machine should restart.If this procedure restarts the machine,service should be called the next time themachine stops. January 2000 Page 34

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